1231291412 has 36 divisors (see below), whose sum is σ = 2387579040. Its totient is φ = 555059232.

The previous prime is 1231291381. The next prime is 1231291429. The reversal of 1231291412 is 2141921321.

It is a super-3 number, since 3×1231291412³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7889 + ... + 50247.

It is an arithmetic number, because the mean of its divisors is an integer number (66321640).

Almost surely, 2^1231291412 is an apocalyptic number.

It is an amenable number.

1231291412 is a deficient number, since it is larger than the sum of its proper divisors (1156287628).

1231291412 is a wasteful number, since it uses less digits than its factorization.

1231291412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42432 (or 42417 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 1231291412 is about 35089.7622106506. The cubic root of 1231291412 is about 1071.8161174260.

The spelling of 1231291412 in words is "one billion, two hundred thirty-one million, two hundred ninety-one thousand, four hundred twelve".